Once a week, because you cannot see this skin at all
A Shih Tzu needs a careful skin and coat check about once a week for a simple reason: under a full coat, you never see this dog's skin by accident. The long, dense hair that defines the breed covers every inch, so the only skin you ever assess is the skin you deliberately part the coat to find. A week is about as long as a starting mat or a pink patch should be left undiscovered.
Part the coat down the centre of the back on your Shih Tzu and look at the skin in strips, then work through the neck, behind the ears, the armpits, the belly and groin, and around the tail. Feel with fingertips as you go. In a Shih Tzu, the earliest mat feels like a small, dense knot close to the skin long before it looks like anything from above, and the skin beneath a mature mat is frequently pink and tender.
Mats are a skin issue first in this breed
Treat every mat you find in a Shih Tzu's weekly check as a skin finding, not a grooming footnote. Mats in the armpits and groin rub with every step, mats behind the ears pull on thin skin, and a mat anywhere traps moisture and shed hair against the surface it covers. Log each mat's location, because the spots that mat weekly are telling you where the coat, the harness, or the dog's own shape creates friction — and those are the spots to check first next week.
Never drag a brush through a mat that is tight to a Shih Tzu's skin to finish faster. Work it apart gently with fingers and a little patience across sessions, or have a groomer clip out a severe one, and then look at the skin that was underneath: if it is red, broken, or sore to touch, that area needs your vet's advice rather than more grooming. Whether in full coat or a short pet clip, the weekly parting routine stays the same.
Face folds, eyes, and ears
Lift a Shih Tzu's topknot and check the skin of the forehead and around the eyes during the weekly session. This breed's large eyes water readily, and hair that lies constantly damp against facial skin can leave it irritated beneath a perfectly tidy-looking fringe. Part the facial hair, confirm the skin is dry and intact, and note any patch your dog keeps rubbing with a paw.
Look at the skin folds around the muzzle and check inside the ears, which hang under heavy hair and ventilate poorly. A build-up of wax, a noticeable smell, redness, or new head shaking in a Shih Tzu points to a vet visit rather than more enthusiastic home cleaning. Also check the skin under the chin and chest, where water and food from bowls keep the coat damp on a low, bearded dog, and where soreness can develop behind the beard unnoticed for weeks.
Slow sessions and a groomer who hears about it
A Shih Tzu generally accepts handling well, so trade speed for completeness: a calm lap session once a week, coat parted strip by strip, will find more than a hurried brush-through ever will. Keep a simple written note — mat behind right ear, skin pink in left groin, chin dry this week — because a Shih Tzu's groomer, whether that is you or a professional, plans far better from a note than from a vague memory that something, somewhere, seemed itchy.
If scratching becomes persistent, hair starts coming away in patches, or you find a lump while parting the coat — record its position and rough size — raise it with your vet and show the sequence of notes. Skin hidden under this much coat gives few outward clues, so your weekly record is often the earliest evidence there is.
When brushing duties rotate in your home, KinsLe Care Teams lets one person own your Shih Tzu's weekly under-coat check and leave its mat notes for the next pair of hands.